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From Pavel Lyalyakin <pavel.lyalya...@visualsvn.com>
Subject Re: How to setup Write-through proxying (aka Replication on-the-fly) in VisualSVN server?
Date Sat, 17 Jan 2015 07:10:21 GMT
Hello,

> On 17 January 2015 at 00:47, STF SVN <lapsap7+svn@gmail.com> wrote:
>>
>> I know this mailing-list has nothing to do with VisualSVN server, but I
>> really need some help.
>>
>> I need to set up SVN replication on the fly, aka write-through proxying,
>> using VisualSVN server.  I know the new version of VisualSVN server supports
>> replication, but for technical reason, I'm still using old version 2.7.

You can't actually call write-through proxy as "replication on the
fly". Its simple replication solution that runs `svnsync` on master
server *after* each commit by post- hook scripts. Commits always go to
master in write-through proxy, the "proxy" part is just about
redirecting all writes to go to master server which then replicates
them to slaves using `svnsync`. Another note: write-through proxy does
not work with Integrated Windows Authentication (i.e. AD Single
Sign-On).

BTW, what are the technical reasons that require you to use VisualSVN
Server 2.7 and don't allow it to be upgraded to 3.2?

>> I have found some articles here and there, eg
>> http://www.visualsvn.com/support/svnbook/reposadmin/maint/#svn.reposadmin.maint.replication
>> and
>> http://svnbook.red-bean.com/en/1.7/svn.serverconfig.httpd.html#svn.serverconfig.httpd.extra.writethruproxy
>> etc etc and tried to follow them but failed.  Maybe because those procedures
>> are for Linux-based SVN server?  And how much are those articles relevant to
>> VisualSVN server, ie Windows-based SVN server?
>
> I've read
> http://www.visualsvn.com/support/svnbook/reposadmin/maint/#svn.reposadmin.maint.replication
> several times, but I have a doubt.  Does it apply totally?  Can I consider
> VisualSVN Server like a *generic* Apache HTTP server?  Or VisualSVN Server
> has some special modification to Apache such that something wouldn't work?

It applies but not totally because sample hook scripts specified in
SVNBook work on *nix Shell only, so they have to be adjusted to work
on Windows.

Here is a sample post-commit hook that will work on Windows (its a
batch script (.bat))
[[
"C:\Program Files (x86)\VisualSVN Server\bin\svnsync.exe" sync
https://SLAVE/svn/repo file:///C:\Repositories\MASTER
exit 0
]]

and post-revprop-change hook
[[
"C:\Program Files (x86)\VisualSVN Server\bin\svnsync.exe"
copy-revprops https://SLAVE/svn/repo file:///C:\Repositories\MASTER
exit 0
]]

> I have also found this article:
> http://www.cardinalpath.com/how-to-use-svnsync-to-create-a-mirror-backup-of-your-subversion-repository/
> but it didn’t talk about putting the SVNMasterURI variable inside HTTPD
> config on the slave server.  And as a matter of fact, I’ve gone through this
> procedure but I cannot commit to the slave server!

The article is not about write-through proxy, it's about creating a
backup repository that's always up-to-date. That's why this article
doesn't cover the proxy part (i.e. SVNMaserURI config on slave
server).

--
With best regards,
Pavel Lyalyakin
VisualSVN Team

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